Set the rack’s bar supports so you can unrack and rerack an empty bar under control without reaching onto your toes. Set the safety bars so they stay clear during a normal squat but catch the bar if you cannot stand back up. The correct settings depend on your rack, your bar path and your squat depth, so follow the rack’s manual and test the setup with an unloaded bar before adding weight.
1. Check the rack, manual and training space
Start with the manual for your exact rack. Assembly, attachment orientation, locking pins, compatible bar dimensions and load limits vary by model; do not assume another rack uses the same setup. Assemble the frame as instructed, use the specified hardware, and confirm that screws, pins and other fasteners are secure. For example, the RPM Power Adjustable Pro Squat Rack manual directs users to secure its spotter bars with pull pins.
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Check the floor and leave room for the bar ends, plates, walkout and your movement. Decathlon recommends a level floor and a safety perimeter of at least 1 m for its Power Rack 900; that clearance is model-specific, not a universal requirement for every rack. Decathlon also says bars used with that rack must be at least 2 m long and either 28 mm or 50 mm in diameter. Check your own rack’s compatibility specifications rather than applying those dimensions to other models.
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- With no plates on the bar, adjust both J-hooks or bar supports to the same height.
- Approach the bar as you would for a squat and check that you can take it out without an awkward shrug, a tiptoe reach or a deep dip.
- Unrack the empty bar under control, take your normal steps into position, then return it to the supports. Make sure you can guide it back onto both supports without stretching or guessing.
For its Adjustable Pro Squat Rack, RPM Power recommends setting the supports just below shoulder height so the lifter can lift the bar while already in a squat position. Treat this as guidance for that rack, not a universal measurement: the right hole depends on your body and the rack’s adjustment increments.
#1 Best Overall
- PAIR OF SPOTTER ARMS - Adds two adjustable bar-support arms to compatible CAP FM-905Q or FM-7000F rack systems.
- ADJUSTABLE PLACEMENT - Reposition the catches along compatible uprights to support different squat, press and bar-rerack heights.
- BARBELL SUPPORT - Provides an additional support point for a compatible bar during strength-training setup and reracking.
- STEEL CONSTRUCTION - Durable steel accessory construction is designed to integrate with compatible CAP rack uprights.
- RACK-SPECIFIC ACCESSORY - Confirm rack model compatibility before purchase; designed for the CAP FM-905Q / FM-7000F rack platform.
3. Set the safety bars for your actual squat
- Begin with the empty bar on the supports. Put the safeties at matching heights and make sure their locks or pins are fully engaged.
- Rehearse your normal squat depth and bar path. The safeties should not touch the bar during a normal repetition.
- Check that, if you crouch lower than usual or cannot stand back up, the bar would meet the safeties before trapping you in a position you cannot exit. Adjust the height and repeat the empty-bar check if needed.
RPM Power recommends its spotter bars just below shoulder level when the lifter is at the lowest squat position. Use that as a product-specific cue, then verify where the bar actually sits relative to the safeties in your own position. There is no universal hole number or numerical safety-bar height established by the manufacturer guidance cited here.
4. Do a final check before loading the bar
- Confirm both bar supports and both safeties are level, seated correctly and locked.
- Check that the rack is assembled securely and does not shift or have frame play. If it moves, stop and check its assembly and floor; Decathlon notes that tightening screws and floor conditions can affect movement.
- Make sure there is adequate space around the rack and that your bar and attachments match the rack’s specifications.
- Follow the rack’s stated load limit. Do not infer capacity from appearance or from another model’s rating.
Once those checks pass, load the bar and begin with a weight you can control. If you change the rack, bar, shoes or squat depth, repeat the unloaded setup check before relying on the safeties.
Quick Recap
Best Value
- [Special Customized]Individually designed for Mikolo folding squat racks and perfectly matched.It also fits 2"X2" square tube power rack with 1" hole(Please check your steel dimension before purchasing).
- [Heavy & Durable] Made of 11-gauge steel, the surface is painted with a special powder coating, which is hard to scratch and stain resistant, and the black matte texture is beautiful and atmospheric.
- [Quick Height Adjustment] It only takes five seconds, select the appropriate height, insert the pin and tighten it, and you can start exercising.
- [High Capacity] Made of 11 gauge steel - can hold up to 800 lbs, just attach the pins to your rack and you can safely perform a variety of weight training such as bench press, deadlift, deep Squats, shoulder presses, and so on.
- [UHMW Plastic Pad] There is a UHMW plastic pad on the extension of the Barbell holder. The surface is smooth, which greatly reduces the noise and pad protects the barbell from damage when the barbell falls.
Rank #4
- ⚠️ COMPATIBILITY CHECK – ONLY FOR 2"x2" POWER RACKS (5/8" or 1" Holes) Please confirm your power rack is 2"x2" (50x50mm) square uprights with 5/8" or 1" diameter holes (see diagram). Not compatible with 3"x3" racks. Measure your rack’s post width and hole size to avoid returns
- 🔩Adjustable Height and Easy Lock Design: You can easily adjust the safety catch to the desired height for different exercises, such as deep squats or bench presses. The easy lock design lets you slide the pin into the hole of the power rack and swing down to lock in place securely and quickly
- 🖐️ Heavy Duty Steel Construction and Powder Coat Finish: These safety spotter arms are made of high quality steel with a durable powder coat finish to help prevent rust and corrosion. Each arm can hold up to 500 lbs, making them suitable for heavy lifting and high intensity workouts.Such as squat, bench press, deadlift, shoulder press, and more
- 🔧 Reinforced Rubber Pad and Welded End Caps: The barbell holder extension has a 17.5" long reinforced rubber pad that reduces noise and protects the barbell from damage when it is dropped. The welded end caps prevent the barbell from rolling off the end and ensure stability and safety
- 【Reinforced Rubber Pad and Welded End Caps】The barbell holder extension has a 17.5" long reinforced rubber pad that reduces noise and protects the barbell from damage when it is dropped. The welded end caps prevent the barbell from rolling off the end and ensure stability and safety
Rank #3
- PAIR OF SPOTTER ARMS - Adds two adjustable bar-support arms to compatible CAP FM-905Q or FM-7000F rack systems.
- ADJUSTABLE PLACEMENT - Reposition the catches along compatible uprights to support different squat, press and bar-rerack heights.
- BARBELL SUPPORT - Provides an additional support point for a compatible bar during strength-training setup and reracking.
- STEEL CONSTRUCTION - Durable steel accessory construction is designed to integrate with compatible CAP rack uprights.
- RACK-SPECIFIC ACCESSORY - Confirm rack model compatibility before purchase; designed for the CAP FM-905Q / FM-7000F rack platform.
Rank #2
- 【3x3 Rack Attachments】Exclusively designed for 3" x 3" power racks with 1" holes, ensuring a snug fit. Each safety arm measures 24.5" L x 3" W, weighs 37 lbs, and integrates seamlessly with your existing gym setup, ideal for home, garage, or light commercial use.
- 【Heavy-Duty 11-Gauge Steel & 1000LB Load Capacity】Crafted from 11-gauge high-strength steel with 8mm thick support plates, built to withstand up to 1000LB. Built to withstand the rigors of intense squat and deadlift training, they offer unmatched stability for heavy lifts as reliable power rack accessories.
- 【Professional Triangular Structure & Dual Locking Design】Features a larger triangular structure with reinforced 8mm thick triangular supports under the spotter arms. Unique dual-locking design，adds double insurance, enhancing safety, supporting higher capacity, and extending service life. ensuring safety spotter arms that are durable, reliable, and ideal as 3x3 power rack attachments.
- 【Premium UHMW Pad & Anti-Roll End Caps】Equipped with a 22.5" long, 6mm thick UHMW plastic pad to reduce noise and protect your barbell. Welded anti-roll off end caps securely prevent the barbell from sliding off the ends of the arms, ensuring maximum safety during intense training sessions. Making them essential squat rack safety bars and power rack accessories.
- 【Versatile Accessory Compatibility】Each safety arm comes with 11 x 1" holes, allowing you to add compatible gym accessories freely. This versatility expands your training options, making it a flexible addition to your workout equipment.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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